Writing-machine.



V PATENTED JUNE 25, 1907. E. B. HESS. WRITING MACHINE.

APPLIOATION PILED APR.11.1907.

2 SEEETS-SHEET 1.

No. 858343. PATBNTED JUNE 25,.19o7.

E. B. HESS.

WRITING MACHINB. ARPLIOATION'PILED APR.11,1907.

v 2 SHEETS-SHEET 2.

ATTORNEY i %a w &mmm

To (ll whom it may concern:

' cation.

UNIT

.. sTATEs ?Arena? OFFICE,

EDWARD B. HESS, OF NEW YORK, N. Y., ASSIGNOR TO- ROYAL TYPEWRITER COMPANY, OF HOBOKEN, NEW JERSEY.

Specificationof Letters Patent.

JERSEY A CORPORATION i NEW Original application filed September 1, 1906, Serial No. :332,940. Divide& and this application filed April '111907 Serial Ne. 867,!345.

Be it known .that I, EDWARD VB. HEss, a citizen of the United States of'Ame-ica, residing in ,the borough of Brooklyn, city and State of New York, have invented certain new and useful Im rovements in Writin Machines, of which 'dh I k This application, which is a division of my applicaton No. 332,940, filed'September .1,

1906, relates particularly to front strike writing machines and 'compriss' means for protecting the key levers, type bars and bear?- ings of the latter" from dust and dirt of erasure, devices whereby the alinement, vertically and horizontally of the line' of print, is maintained. i

In the accompanying drawings, Figure 1 is a perspective view showing a complete front strike typewriting machine to which the inprovements constituting the subject matter of this applicationare applied; Fig. 2, a detail view showing a type bar in a type bar guide at the printing point: Fig. 3, a perspective view of a type bar constructed in ac- 'cordance with this invention; and Fig. 4, a

longitudinal vertical central section.

In front of the platen a, contiguous to the printing point, ismounted an ordinary typebar guide in the channel between the jaWs d of which the 'type bars are guided to the printing point. Centrifugal action tends to move the heads of the type-bars away from their axes and, if there be slight lostmotion,

due to wear or for other reasons, the type,

head may, at the moment of printing, thrown somewhat above the proper position,

making the impressions more or less out of' of the angle of the bent bars, is .aguide sto c.

which, when the part of the type bar etwcen it and the type head enters the chane following is a-'speci nel of the guide, may come against the under side of 'one of ,the jaws .d of. the guide andpositively determines the osition, vertcally, of

Patented June 25, '1907.

the type bar head wit .reference to the line of print should there be sufficient lost motion to otherwise permit the typehead to move vertically and carry the type above its roper osition'. It is preferred that the face of t e guide stop that may' contact With the horn d be beveled as indicated at c', -its highest edge being at c so that as it passes underxthe type bar 'guide its high edge will' contact therewith. This particular construction and shape is adopted in order 'to e. bar to stick in the ide. In practice, tis sufiicient that suo a guide stop be placed on one side only of each type bar The guide stopsm on one side of the center line of the machineall point to the right and on the other side all point to the left, i

A segment e in which the type bars are pivoted has attached to it, or formed with it, a forwardly projecting curved flange bars are pivoted; and each type bar has, n its upper edge a recess g into which such of the same radius as the-curve in which-t e type flange enters as the type'bar comes to the printing point. The flange overhangs all the slots in the segment in which the type bars are pivoted and Swing, and the thickness of. i

the segment at the upper walls of the type,` bar slots is such that it extends well to t e rear 'and front of the type bar pivots aifording protection from dirt of erasure falling either in front or in rear of the segment. The type bar pivots are substantially in line below the line of print so that if the pivots were un rotected the dirt and grit of erasure would fal directly upon them. This arrangement, of itself, is not claimed herein having been shown and claimed by me in an application, Serial No. 246,493, filed February 20,1-905 (a renewal of application No. 73,570, filed Aug. 28, 1901,) and is now before the Patent Office in a division of said application filed June 30, 1903,Ser. No. 163,691.

i In the machine hereinillustrated, the ribbon bobbins are located below 'the top of and inside the machine. The ribbon passes upwardly over idlers h, h, ,located in apertures in side cover lates h' h' andat the printin point, is' a rib on vibrator and guide 'i throug IOO which the ribbon passesQ The type bar uide is composed of two separated horns d,

projecting forwardly from uprightangle plates y' ivoted aty" near the upper *horizontal e ge -oftthe` type bar segment and made adjustable by means' o'f slots and -set screws Ic. Secured under the side cover V of *the segment'are two r ro plates h' and supported in art by the ,ends st'- sheds lir,- n, which extendirwardly, first, horizontally, and then incline upwardlyto the' type bar i l guide. 'Their front edges incline rearwardly andhave the c ontour of a com' ound or're- ..verse curve. 'Their inner en s,- however,

adjacent the' type bar guide are in close proximity to the 'ribbon vibrator and extend I 'somewha't forward of the guide and are sufficiently separated to permit free entrance of'thet flange o at their inner ends thatfits lo'osely in e'bars thereto. They are each provded wth a downwardly turnd vertical the' angle of the type bar guidepiecej; or the 'verticaledge'of the fiange o may lie back of the vertical piece j, and its horizontal edge.`

may' rest upon the straight upper edge of type barsegment. At the ang e formed by the-downwardlyrextending fiange-a and at the extreme inner end of the upwardlyinchned part, each dust shedis notche dor cut 'away to fit the 'horn d of the 'type bar guide.

The inner ends of the two dust shed sections and the contour ottheir front edgesaresuch i as to afford- 'entirely free movement of the i type bars to the printing point but otherwise to givethe greatest measure' of v rotection to 'the type'bar bearings 'and keyf evers above:` :which they are disposed. With the arra'nge 'ments described to project the type bars and by inclosing the front 'of the machine with a vertical frame plate p and the sides and rear: wth nclosure plate s; the' machine is' 'as com;

pletely protected from int'rusion of dustes 1t c'an possibly be. the machine is afiord'ed 'at desired places by hinged panels g (one of which ap ears 'in Fig. 1) that may be placed in both si e plates as wellas elsewhere. For further protection against dustgthe bottom of the machine may be closed by a plate. This closure-oi the machine serves not only to exclude dust but also to rende-r the machine less noisy than it.

would otherwise be and such noise as might occu' in the operation of the machine may be `'further reduced by mounting it upon a pad of fibrous or elastic material. i

Owng to the location of the ribbon vibrator and type bar guide and particularly because of the closeness of the ribbon vibrator to the printing point, it is not the custom of operators to make erasuresdirectly at the printin -point but to do it on either side thereof. ile therefore some of the gritof erasu-re ma fall down behindthe flange o and be de ected bythesegment from the type bar pivots, the major part of it will fall Access to the interier of upon the dust guard sections mm and may b'e brushed away. The upper dust shed'is,

therefore a more effective protection of the pivots than is the guard formed by the increased Width of "the segmentadjacent the type bar pivots-. Ordinarily n machines hereiioiore -constructed, the rear part of the segment has usually been so disposed as to protect the type bar pivots from grit' falhn in 're'arof the segment The projection a the front of the segment -was designed as a protection 'against grit tallin in front thereof and is', in' a way reasonabl y efficientparticularlyin connection with the central type "barsg but toward the ends of thesegments the flat ty e bars are turned with' inereasing angl-e as t e end is' approa ched so that their fiat Sid-es are not adequ'ately protected-b the forward projeotion-of the segment an are liable to receive the dirt and grit of erasure at either side of the' printing point and a considerab-le' portion of such dirtwill work ,into the hearing of these bars. Experien'ce has demonstrated that the npper dust shed m n V- afiords a highly efficient protection to 'the pivots of the bars on either side of the. eentral bars, and also to an important extent to the pivots of the central bars, because except for thesheds m, 'n thegrit from erasures ;made to the right and left-of the ribbon vibrator Would fall on the flange or shoulder f and'work its way toward the centerbv reason *of 'the in'clination of the flange, I therefore', such dirt of eraure as occurs on either side of the ribbon vibrator is intercepted by the dust guard plates or sections m, n the type bar pivots are protected t'o the possible extent much more efficlent ly than they can be by the mere projection or fiange j alone. It is feasible to have these upper dust shed sections widely separ`ated at the front so as to aiford ready and convenient access, for cleanin to the type bar heads as they lie closely si e by side upon their back stop or rest. "This arran ement of dust shed at thetype bar guide c osely adjacent the printing point extending laterally and inelim'ng outwardly at its front edge'consti- .tutes a material; improvement invisible writing' machines of the general kind depictedin the drawing I claim:

1. In a `front strike writing machine a.

IOO

reatest posed of two sectons .whose narrow nnerj &58,343

ment in which they are pivoted constructed to overhang the ivots at both the front and rear, and a dust s ed arrangd above the segnent and composed of two sections whose mner ends are closely adjacent 'the printing point and which extend laterally and forwardly bengwidely separated. at' their front ends to permt access to the type bar rheads.

3. In a front strike writing machine, adust 'shed lying within the chord of the aro' in which the type bars are'pivoted and a second dust shed arrangedabove the chord of the extend lateral i ngs;

' trally dsposed t e vibrator, a dust h ment having bearings for the ty e constructed to 'overhang 'said f arc and extendng from olo se'ly adjacent the printing point laterally toward the sides of the machine. 4 I v v 4. Ina front strike machine, a platen, a centrally disposed ribbon vibrator and a cenbar guide in front ofthe tions having. their narrow inner ends contigued composed of two sec- V ous the. gude and extending laterally 'wth' their front edges inclined outwardly, combined with a vertically disposed type bar segbars and earings in front' andrear.

5. A front strike writing1 machine compris ng a platen, a centrally isposed ribbon vibrator and type bar guide, a dust shed com- -e n`d`s,are contigubus/to the guide and which Y clined outwardly, combined with a "t e bar s'ment located belowsaid dust guar prov formedtoproject orwa rdl y over said bear- `6. Ina front strike writing machine, a gaten, a vertically disposedsup ort located 'with their front edges inlow the platen rovded with earings arlranged in an arc' or the type-bars and'a forward projection' overhangng' the bearings;

type bars pivotedin said bearin s and nor-.

mally .lying substantially 'par alle with their heads toward thefront, and a 'dust shed arranged above 'the segment and extending on 'either side of the prnting point. y '7 Ina front strke writing machine,` a centrallydisposed ribbon vibrator, a centrally ally therefrom.

flanges o a front plate cl'osi i front of thet justable sections .and a dust shed com osed i of two sections whose inner ends are c osely adjacent thegde and which extnd later- 3. In a front strike writin low 'the platen and substantally in line "below the printing line thereon; type bars pivotedtherein' inan arc the segment bemg pro- I i 60. m c a I platen, a transversely-arrange segment bee' 4 .vided with means for protecting'the type bar ivots from ditt of erasure, and ad'st shed ocated above a chord pass' .through the.

pivots ofthe end type bars' an compos ed of two sections whose nner ends -aregarranged closely adjacent the printingpoint and .whch extend laterallyand forwardly with theu' front'edges inclined outwardly. A.

9. A front strike writing machine comprsing the combination of a segment located in a plane below the' platen, type .bars pivoted therein, Side cover platesateach side of the i assemblage of type-bars', ribbon guderolls mounted in ap'ertures in the cover plates, a. i

ribbon 'guide and vibrator at the pr'inting point thi-ou h which the ribbon 'passes, a type ,bar guie at the printing pont, and dust ,sheds extendng from the side plates inwardl-y and u wardly to the horns'ofthe type-bar flanges o'.

*10. A front' strike writing machine com e and having rea: 'vertical prisin 'the combination of a segment located V ane below the platen, type-bars pvot-- ed t erein, side cover' plates at each side of 'the assemblage of type-ham; ribbon guide rolls mountedn apertures in the cover tes,

. a ribbon guide and vibrator atthe printing point through 'which the ribbon passes a 't e' bargude at the print' ed with bearin s for the type'bars and -sl i ds po nt, dnst extending from-the si e plates n-. wardly and'u wa'dly to the horns of the 'type bar 'gui e and having- .reat 'vertical the frame in e-bar'heads an -plates closng IOO 'the sides of t e -frame having panels or doors interiorof the frame.

;In te'stiinony whereof, I have herennto subscribed my name.

-adapted to be' opened to afordaccess to the g 

